Bench back



FIG. 1 is a perspective view of a first embodiment of the bench back showing my design.

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a front view of a second embodiment of the bench back having seven slats;

FIG. 9 is a front view of a third embodiment of the bench back having five slats; and,

FIG. 10 is a front view of a fourth embodiment of the bench back having three slats.

The features presented in broken lines are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a bench back, as shown and described. 